Been a while since I saw a CV. If I remember right, the A-400 is similar to A-600 (beefier Power supply & diff output biasing).
Perhaps you can use a A-400 archived [url=http://elektrotanya.com/?q=showresult&megnev=%20cerwin&megnev2=a-400&am

Definitely sounds like a digital problem. It could be anything from corrupted software(doubt that) to a leaky steering diode or a gate issue. Without some sort of a diagram it is rather difficult to pinpoint. It sounds like the data line is latched to a s

Not familiar with the unit and doubt if you could find any type of schematic. Based on what you have found, the key is the supply to the LTC1733 (pin 2). Obviously it won't operate without a source. At this point you may have anything from a damaged IC o

Thanks for your reply vtech, I have given up and put it all back together.
When I turn on the XBoard, it always starts with its output set to MIDI channel 2, so I have to change it manually to MIDI channel 1. When I start writing a song and try to outp

When I am working on a [url=http://www.sourcinggate.com/laptop-and-netbook-c-252.html][b:ad5c0db7bf]laptop[/b:ad5c0db7bf][/url] I like to take pictures (digital). I print the pictures out. Not all screws are the same, so when I remove a screw I tape the s